BC Card Cup is a mixed tournament as amaterus can also participate. There were five Korean amateurs who each managed to defeat three professional players in a row to make it through the preliminaries, but of the five ones only Han Taehee won in the main tournament.

Yu Bin, a famous Chinese player who used to be in the top a few years ago, also lost to an amateur (Na Hyun).

Here is the game record between Yu Bin 9p and Na Hyun 6 dan amateur: Yu Bin, playing black, lost by half a point.

Gu Li won the 4th game of the BC Cup final and defeated Cho Hanseung 3:1.
Gu Li won 5 different international championships this past year, compared to Lee Sedol’s 2 and followed by Lee Changho and Choi Cheolhan with one each, so he is undeniably the most successful professional player by that measure. (source)

The two finalists in the international BC Cup are Gu Li of China and Cho Hanseung of Korea.
To qualify in this final, Gu Li defeated Lee Wondo (Korea), Lee Jungwoo (Korea), Heo Yeongho (Korea), Piao Wenyao (China) and Cho Hunhyun (Korea, the ex-teacher of Lee Changho), while Cho Hanseung defeated Xie He (China), An Hyungjun (Korea), Iyama Yuta (Japan), Huang Yizhong (China) and Lee Sedol (Korea).
The score is 1:1 so far: Gu Li won the first game but lost the second one.
Here is a photo from the second game: